[  84.2154859] panic: kernel diagnostic assertion "uvm_page_locked_p(old_pg)" failed: file "/syzkaller/managers/netbsd-kubsan/kernel/sys/arch/x86/x86/pmap.c", line 4351 
[  84.2355099] cpu1: Begin traceback...
[  84.2555528] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
[  84.2856055] kern_assert() at netbsd:kern_assert+0x63
[  84.3256806] pmap_enter_ma() at netbsd:pmap_enter_ma+0x1f10 sys/arch/x86/x86/pmap.c:4351
[  84.3657551] pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4168
[  84.4058343] uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2253
[  84.4459074] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower_promote sys/uvm/uvm_fault.c:2211 [inline]
[  84.4459074] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower sys/uvm/uvm_fault.c:1759 [inline]
[  84.4459074] uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd sys/uvm/uvm_fault.c:915
[  84.4859817] trap() at netbsd:trap+0x1205 sys/arch/amd64/amd64/trap.c:534
[  84.4960012] --- trap (number 6) ---
[  84.5060219] Skipping crash dump on recursive panic
[  84.5060219] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x148fe for type 'struct x86_64_frame' which requires 8 byte alignment

[  84.5260524] Faulted in mid-traceback; aborting...
[  84.5360720] fatal breakpoint trap in supervisor mode
[  84.5360720] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x200010c0 ilevel 0 rsp 0xffffbf00b3c36ba0
[  84.5460916] curlwp 0xffffbd1a43d4fba0 pid 1796.1 lowest kstack 0xffffbf00b3c342c0
Stopped in pid 1796.1 (syz-executor.0) at       netbsd:breakpoint+0x5:  leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0x109 sys/ddb/db_panic.c:67
vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
isAlreadyReported() at netbsd:isAlreadyReported
HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc
HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408
db_nextframe() at netbsd:db_nextframe+0x6f6 sys/arch/amd64/amd64/db_machdep.c:153
db_stack_trace_print() at netbsd:db_stack_trace_print+0x2c4 sys/arch/x86/x86/db_trace.c:277
db_panic() at netbsd:db_panic+0xa3 x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:67 [inline]
db_panic() at netbsd:db_panic+0xa3 sys/ddb/db_panic.c:57
vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336
kern_assert() at netbsd:kern_assert+0x63
pmap_enter_ma() at netbsd:pmap_enter_ma+0x1f10 sys/arch/x86/x86/pmap.c:4351
pmap_enter_default() at netbsd:pmap_enter_default+0x7a sys/arch/x86/x86/pmap.c:4168
uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0x283 sys/uvm/uvm_fault.c:2253
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower_promote sys/uvm/uvm_fault.c:2211 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd uvm_fault_lower sys/uvm/uvm_fault.c:1759 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x29bd sys/uvm/uvm_fault.c:915
trap() at netbsd:trap+0x1205 sys/arch/amd64/amd64/trap.c:534
--- trap (number 6) ---
[  84.5561106] Skipping crash dump on recursive panic
[  84.5561106] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x148fe for type 'struct x86_64_frame' which requires 8 byte alignment

[  84.5561106] Faulted in mid-traceback; aborting...
[  84.5561106] fatal breakpoint trap in supervisor mode
[  84.5561106] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x200010c0 ilevel 0x8 rsp 0xffffbf00b3c358a0
[  84.5561106] curlwp 0xffffbd1a43d4fba0 pid 1796.1 lowest kstack 0xffffbf00b3c342c0
Stopped in pid 1796.1 (syz-executor.0) at       netbsd:breakpoint+0x5:  leave